Precombustion chamber for airless injection oil engines



Feb. 16, 1932. F. MODERSOHN 1,845,620

PRECOIBUSTIOH CHAIBHR FOR AIRLESS INJECTION OIL ENGINES Filed Nov. 12,1926 I raven for: 6 Hi3: Modcrsokn ,9 $1447 ,%1;5Z6M

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DEUTZ, AKTIEHGEBIELSOHAIT, Q1 @LOGHB- rumor CHAMBER FOB AIBLESSINJECTION OIL ENGINE Application fled Iovember 1!, 1918, Serial No.147,940, and in Germany February 8, 1058.

It is well known that oil engines have been fitted withpre-combu'stion-chambers, in

- cooled by being inserted into a space filled advan serving to thebottom of the horizontal enginesto with cooling water. This coolingspace can be designed to be a part of the pro-combustion chamber bothbeing in one piece. This makes a costly apart from the disof a compcated shape with inaccessib e hollow parts. It isnot easily or quicklyreplaced which is an important item when only indifl'erent and unskilledattendance is available.v

The present invention avoids these disadvantages by the simple expedientof fixing the pre-combustion-chamber in the cylinder-castiilig0 y meansof a ring-shaped piece 'as cover to the cooling water ipaoe in which thespray-valve is inserted. t is an advantage to shape the ringiece insucha way that its outer wall exten down.

pre-combustion chamber so that the latter is enclosed by a guardingwall. In this way the combustion-cham-- bar is an extremely simple andcheap part which can be easily replaced after removing thering-shapedfiece if varying conditions and fuels shoul require this. Y

The ring-piece is easily removable thus the cooling water spacecompletely accessi 1e for cleaning. The outer wall of the ring-pieceencloses the pro-combustion chamber and provides a ard against con tact'with the hot wall. e appearance is also im roved as thepre-combustion-chamher-w are liable to become scaled through the heat ofoperation.

It is also an advanta cially with.

ave the coolingspace of the spray-valve separate from the linder-coolingspace, because to withdraw e ring-piece requires only draining ofi thesmall quantity of cooling water in the sprayvalve space leaving thecooling water space of the cylinder or cylinder-head as it is.

To accompanying drawing shows a suga I tiOll- .1 epre-combustion-chamber b is fitted to the cylinder-head a by means ofthe ring-piece 1.. specimen of design embodying the or wall member asurrounding it and bolts d. It carries a collar e resting on ribs andthis collar is designed to accommodate the spray valve f. The coolingwater-space 9 between pre-combustion-chamber b and rigs-piece c acmgs ismade tight through the machin of b and c and the packing between a andc. When the engine 1soperating the heat is transmitted directly andindirectly through the bottom and top surfaces of the chamber 6 whichonly e ands in the direction of the axis of the cylin er. Any additionalstresses are taken up by the bolts d. Dangerous heat stresses aretherefore avoided which would not be the case whenpre-combustion-chamher and spray-valve are cast in one with consequenthot inner walls and cooled outer parts which must result in heavystrains in the connecting material. The desi nof the collar 0 can besuch that the spray-Va ve and the chamber are not so arated if thecooling water space is opene by lessening bolts d and takin ofi ring 0.

am aware that the invention may be embodied in other specific formswithout departin from the spirit or essential attributes thereo and I-therefore desire the present embodiment to be considered in all respectsas illustrative and not restrictive, reference being bad to the appendedclaims rather than to the foregoing description to indicate the scope ofthe invention.

I claim as my invention: 7

1. The combination of a cylinder; a precombustion chamber communicatingwith the interior of said cylinder; a spray valve opening into saidprecombustion chamber; a 00L lar embracing said spray valve and providedwith ribs engagin said precombustion cha m her to ostion sai spray valverelative thereto; an a wall member surrounding said spray valve and enaging said collar and said precombustion chamber to form with said s rayvalve and with the wall of said'precom ustion chamber a water jacket forsaid spray valve.

2. A Diesel t pe engine having, in combination, a cylinder, a memberformed to provide a re-combustion chamber having inlet and on etopenings; said member formed separately from said cylinder anddetachably supported on the head of the latter with said outlet openingin communication with said cylinder, a spray-valve in registry with saidinlet opening, and a removable wall member surrounding said spray-valvein spaced relation to said first mentioned member and-forming with thelatter a water jacket for said precombustion chamber and said valve.

3. A Diesel type engine having, in combination, a cylinder, a memberformed to provide a pro-combustion chamber h'avin inlet and outletopenings, said member ormed separately from said cylinder and detachablysupported on the head of the latter with said outlet opening incommunication with said cylinder, a spray-valve in registry with saidinlet opening, a removable wall member surroundin said spray-valve inspaced relation to said first mentionel member and forming with thelatter a water jacket for said recombustion chamber and said valve, ansecurin means engagin said wall member and cylin er for detacha lysecuring said Well member and re-combustion chamber in assembledrelation with each other and said cylinder.

4. A Diesel t engine having, in combination, a cylin er, a member formedto provide a pro-combustion chamber having aninlet opening in its upperwall and an outlet opening in its lower well, said member formedsepartel from said cylinder and supported.

on the ead of the latter with said outlet opening in communication withsaid cylinder, a detachable wall member above the upper wall of saidfirst mentioned member in spaced relation thereto so as to provide awater jacket, said wall member having an opening in alignment with saidinlet opening, a sprayvalve extending through said openln in said wallmember into registry with said inlet opening, a spray-valve supportingmember carried by the upper wall 0 said first mentioned member, saidsupporting member cooperating with said wall member to seal said openingof the latter a ainst leakag: and to permit removal of sai wall mem rwithout removal of said spray-valve.

5. A Diesel t pe engine having, in combination, a cylin er, a memberformed to provide a pre-combustion chamber havin inlet and outlet openinsaid member ormed separatel from sai c linder and detachably supporte onthe head of the latter with its lateral walls exposed with respect tosaid head, said outlet openi being in communication with said cylin er,a spray-valve in re ry with said inlet opening, a removable we 1 membersurrounding said spray-valve in spaced relation to said first mentionedmemher and forming with the latter a water jaclket for saidpre-combustionchamber and vs vs, tion surrounding said lateral walls ofsaid valve supportin member carried said wall member having a skirtp0rpre-combustion chamber in spaced relation thereto.

6. A Diesel t pe engine having, in combination, a cylin er, a memberformed to pro- 'valve, said wall member havinga skirt portionsurrounding said lateral walls of said pre-combustion chamber in spacedrelation thereto, and securing means engagm said wall members andcylinder for detac ably securing said wall member and pre-combustionchamber in assembled relation with each other and said cylinder.

7. A Diesel t pe engine having, in combination, a cylin er, a memberformed to provide a pre-combustion chamber having an in-' let opening inits upper wall and an outlet opening in its lower wall, said memberformed separately from said cylinder and supported on the head of thelatter with its lateral walls exposed with res to said head, said outletopening being in communication with said cylinder, a detachable wallmember above the upper wall of said first mentioned member in spacedrelation thereto so as to form a water jacket, said Well member havingan opening-in alignment with said inlet opening, a spray-valve extendingthrough said openin in said wall member into registry with sai inletopening, a sprayy the upper wall of said rst mentioned member, saidsuppbrtin member cooperating with said wall member to seal said openingof the latter against leakage and to permit removal of said wall memberwithout removal of said spray-valve, said Well member having a skirtportion surrounding said lateral walls of said first mentioned member inspaced relation thereto. 4

8. A Diesel t pe engine having, in combination, a cylin er, a memberformed to provide a pre-combustion chamber having an inlet opening inits upper wall and an outlet opening in its lower wall, said memberformed separately from said cylinder and supported on the head of thelatter with its lateral walls exposed with respect to said head, saidoutlet opening being in communication with said cylinder, a detachablewall member above the upper wall of said first mentioned member inspaced relation thereto so as to form a water jacket, said well memberhaving an opening in alignment with into registry with sai a spray-valveextending 1n said wall member inlet opening, a sprayvalve supportingmember carried by the u per wall of said first mentioned member, saidsupporting member cooperating with said wall member to seal said openingof the latter against leakage and'to permit removal of said wall memberwithout removal of said sprayvalve, said wall member having a skirtportion surrounding said lateral walls of said first mentioned member inspaced relation thereto, and securing means enga ing said wall memberand cylinder for detac ably securing said wall member and pre-combustionchamber in assembled relation with each other and said cylinder.

In testimony whereof I have signed my name to this specification.

DR. FRITZ MODERSOHN.

said inlet opening, through said opening said inlet opening, aspray-valve extending through said opening 1n said wall member intoregistry with said inlet opening, a sprayvalve supporting member carriedby the u per wall of said first mentioned member, said supporting membercooperating with said wall member to seal said opening of the latteragainst leakage and to permit removal of said wall member Withoutremoval of said sprayvalve, said wall member having a skirt portionsurrounding said lateral walls of said first mentioned member in spacedrelation thereto, and securing means engaging said wall member andcylinder for detachably securing said wall member and pie-combustionchamber in assembled relatlon with each other and said cylinder.

In testimony whereof I have signed my name to this specification.

DR. FRITZ MODERSOHN.

CERTIFICATE OF CORRECTION.

Patent No. 1,845,620. Granted February 16, 1932, to

FRITZ MODERSOHN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 75, claim 6, after the syllable "communi" insert the syllable andwords cation with said cylinder, a spray-valve in registry with saidinlet opening, a removable, and same claim, lines 77 and 78, strike outthe words "registry with said inlet opening, a removable wall membersurrounding said spray-valve in", and line 86, for "members" readmember; and that the said Letters Patent should be read with thesecorrections therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 29th day of March, A. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,845,620. Granted February 16, 1932, to

I FRITZ MODERSOHN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 75, claim 6, after the syllable "communi" insert the syllable andwords cation with said cylinder, a spray-valve in registry with saidinlet opening, a removable, and same claim, lines 77 and 78, strike outthe words "registry with said inlet opening, a removable wall membersurrounding said spray-valve in", and line 86, for "members" readmember; and that the said Letters Patent should be read with thesecorrections therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 29th day of March, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents.

